DUV light is of great importance in applications, including nanolithography, material science, and biology. Metasurfaces, comprising well-engineered nanoresonators, promise to improve DUV technologies due to their capability to manipulate light at the nanoscale. We present metasurfaces showing high-quality-factor resonance (high-Q) in the DUV range. We combined low-loss dielectric materials, resonance mode associated with the quasi-bound state in the continuum, and various device schemes to realize the DUV high-Q metasurfaces. We demonstrate metasurfaces with functionalities including imaging-based biosensing and high-Q optical charity. Fabrication and characterization of the high-Q metasurface will be reported. This work provides a platform to advance DUV nanophotonics in sensing, quantum optics, and nonlinear optics.
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